How does the acceleration due to gravity near Earth's surface change if the mass increased but its diameter didnt change?

Answer 1

The force of gravity between two objects is directly proportional to the product

of their masses, and it also depends on the distance between their centers. If

the distance between them doesn't change, and either or both masses increase,

then the gravitational forces between them would increase.

One important implication of this theory is the expectation that if you eat more,

and cause your own mass to increase, then your weight will increase, in direct

proportion to your mass. Do I smell a Nobel Prize for investigating this theory ?

Answer 2

The acceleration due to gravity near Earth's surface would not change if the mass increased but the diameter remained the same. This is because the acceleration due to gravity is determined by the mass of the Earth and the distance from its center, which is equivalent to the radius of the Earth, rather than the diameter.